diff --git a/src/lib.rs b/src/lib.rs
index 0cc0beb2d7..521692b6d3 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -23,7 +23,7 @@ pub enum TableKind {
 }
 
 /// Physical memory address
-#[derive(Clone, Copy, Debug, Eq, Ord, PartialEq, PartialOrd)]
+#[derive(Clone, Copy, Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
 #[repr(transparent)]
 pub struct PhysicalAddress(usize);